Search for chargino-neutralino production in {ovr p}p collisions at {radical}{ovr s} = 1.8 TeV.

Journal Article · Mon Jan 01 04:00:00 EST 1996 · Phys. Rev. Lett.

DOI:https://doi.org/10.1103/PhysRevLett.76.4307· OSTI ID:937961

Abe, F; Akimoto, H; Akopian, A; Albrow, M G; Amendolia, S R; Blair, R E; Byrum, K L; Crane, D; Fuess, T A; Hohlmann, M; Kuhlmann, S E; Nodulman, L; Proudfoot, J; Wagner, R G; Wicklund, A B; KEK,; FNAL,

We have searched for chargino-neutralino production ({tilde {xi}}{sub 1}{sup {+-}}{tilde {xi}}{sub 2}{sup 0}) in 1.8 TeV p{bar p} collisions, followed by their leptonic decays {tilde {xi}}{sub 1}{sup {+-}}{yields}{tilde {xi}}{sub 1}{sup 0}{ell}{sup {+-}}{nu} and {tilde {xi}}{sub 2}{sup 0}{yields}{tilde {xi}}{sub 1}{sup 0}{ell}{sup +}{ell}{sup -}. These trilepton events are expected within a framework of the minimal supersymmetric standard model (MSSM). In a 19.1 pb{sup -1} data sample collected with a Collider Detector at Fermilab, no trilepton events were observed. Upper limits on {sigma}(p{bar p} {yields}{tilde {xi}}{sub 1}{sup {+-}}{tilde {xi}}{sub 2}{sup 0})BR({tilde {xi}}{sub 1}{sup {+-}}{tilde {xi}}{sub 2}{sup 0}{yields}3{ell}+X) were obtained for various MSSM parameter space regions, yielding new 95% confidence level lower limits for the neutralino ({tilde {xi}}{sub 2}{sup 0}) mass which extend as high as 49 GeV/c{sup 2}.

• Research Organization: Argonne National Laboratory (ANL)
• Sponsoring Organization: ER
• DOE Contract Number: AC02-06CH11357
• OSTI ID: 937961
• Report Number(s): ANL-HEP-PR-96-96
• Journal Information: Phys. Rev. Lett., Journal Name: Phys. Rev. Lett. Journal Issue: 23 ; 1996 Vol. 76; ISSN 0031-9007; ISSN PRLTAO
• Country of Publication: United States
• Language: ENGLISH

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